Device for grinding and polishing glassware



(No Model.)

H. C. WOOD. DEVICE FOR GRINDING AND POLISHING GLASSWARE.

No. 469,052. Patented Feb. 16, 1892.

ll ulmmullm "m II NITED STATES PATENT Or-FioEa HARRY CURTIS WOOD, FTIFFIN, OHIO.

DEVICE FOR GRINDING AND POLISHING GLASSWARE.

SPECIFICATION forming part of Letters Patent No. 469,052, dated February16, 1892.

Application filed August 31, 1891. Serial No. 4041284. (No model.)

To aZZ whom it ntay concern:

Be it known that I, HARRY OURTIs W001), a citzen of the United States,residing at Tiffin, 1n the county of Seneca and the State of Ohio, haveinvented a new and useful Improvement in Devices for Grinding andPolishing Glasszvare, of which the following is a specifica- Myinvention is directed to improvements in devices for grinding andpolishing the mouths of light blown glassware, and particularlytumblers; and the objects of myimprovements are to produce acomparatively light machine for holding and operating on single articlesfed by gravity to the grinding-wheel, with provision for adjusting theholding device for the article centrally or eccentrically to the axis ofthe grinding-wheel, whereby the article may be presented to differentparts of the grinding-surface and the latter thereby preserved forlonger effective use, and with provision for adjusting and limiting thedescent of the article to the grinding-surface, as illustrated in theaccompanying drawings, and the novel features of which I will point outin the claims concluding this specification.

Referring to the drawings, Figure 1 is an elevation of my improveddevice for the purpose stated. Fig. 2 isa vertical section thereof. Fig.3 is a top view, and Fig. 4 is a vertical section, of the inverted cupthat holds the article being ground.

The frame is a casting of two semicircular ring parts 1 1, each havingend flanged parts 2 2, by which they are bolted together to form a ring,each having a base-flange 3 3, by which the ring is bolted to a table 4,and each having at its upper side a lug 5 5, upon which are mounted thedevices for holding the article to be ground. The end flanged parts ofthe ring form the bearing-boxes for a vertical shaft 6, on the end ofwhich above the ring is fitted a horizontal grinding-wheel '7, which Iprefer to make of emery as being best adapt ed for grinding the edges oflight glassware. An upright 8 is fixed to each ring lug, which risesabove the grinding-wheel, and to their upper ends are fixed otheruprights 9 by means of thumb-screws l0,which pass through slots topermit of the vertical adjustment of the said uprights 9, the upper endsof which are turned inward and upon which is secured a ring 11, so thatits walls stand vertical between the uprights and over the grinding-surface. In this position the ring is secured by bolts 12, which passthrough radial slots 13 in a rim 14 of said ring, which rim rests uponthe upper ends of the uprights 9, whereby the said ring can be adjustedlaterally to set it centrally with or to one side of the center of thegrinding-wheel. An inverted cup 15 for holding the article to be groundis adapted to fit closely and to have vertical movement within thisring, and for this purpose their joining walls are turned perfectlysmooth and straight. Vertical grooves 16 16 are formed diametrically inthe inner walls of the ring to receive pins 17 17, projecting from thewalls of the inverted cup as a means of holding the cup firm,preventingthe latter from turning within the ring and for limiting the descent ofthe cup within the ring. These grooves 16are open at the top of the ringto permit the cup'to be placed Within and removed from the ring, andtheir lower closed ends form stops on which the pins rest as a limit tothe descent of the cup. The chamber of this cup is preferably of theform of the article to be ground, and at one or more places its innerwall is formed with annular recesses, within which are placed rings 18of rubber, cloth, cork, or similar soft substance for gripping andholding the article 19 placed therein inverted and with its bottompreferably supported upon the bottom of the cup and its mouth projectinga little below the mouth of the cup to expose the edge of the article tothe grinding-surface and allow it to be ground down to a limitdetermined. by the descent of the cup-pins in the ring-slots; and itwill be understood that this descent must not permit the contact of thelower edge of the cup with the grinding-surface. The shaft of thegrinding-wheel is made hollow and is open at both ends to allow a smallpipe 20 to be passed up through it for supplying water underhydrant-pressure to the surface of the wheel, which is driven by apulley 21 on the shaft.

Theoperator places the article in thecup and ion puts the cup into thering with the edge of the article resting on the grinding-wheel, overwhich the water flows. It will be understood that the ring is adjustedand set vertically by the thumb-screws of the cup-supporting uprights tolimit, by the cup-grooves and ringpins, the descent of the cup andthereby limit the grinding down of the edge of the article, the descentof which is free and effected by the weight of the cup and the articleheld therein and that when the limit of descent is reached the grindingceases while the wheel continues in motion. It will also be understoodthat one operator can attend to a number of these machines fixed alongthe table and driven from the same power, as he is only required toremove the cups, take out the ground tumblers, and put other tumblers inthem and replace the cups in the rings. A hole 22 in the bottom of thecup provides for the introduction of means for pushing out the tumblerwhen the cup is removed, and the handling of the cup to place and removeit and to place andv remove the article is convenient, requires littletime, and is not liable to break the article. The sectional constructionof the frame renders it easy to make, to put together, and to adjust.

The provision for adjusting or setting the cup laterally either side ofthe center of the grinding-Wheel gives the advantage of shiftingdifferent articles, so as to change the relation of each tothe'grinding-surface as the latter wears, and in this way get thebenefit of using as much of the grinding-surface as possible. allel withthe face of the grinding-wheel, and is made by shifting the ring on itsuprights to the one side or to the other between them or centrally withthe wheel. The emerywheel maybe secured on its shaft so as to bereversible to increase its capacity for wear, and when its surfacebecomes ridged it can be ground smooth.

It is important to notice that the article being ground has no movementindependent of its holding-cup, and within said cup it is held by thegrasp of the rubber rings countersunk in the walls of the cup, so thatthe article can be forced into the. cup against the pressure of therubber rings and held by such pressure within the cup and as easilyforced out of the cup by pressure applied through the bottom openingtherein. It is obvious that the pins'may be in the ring and the groovesin the cup-walls, and that the uprights 8 and 9 may be ring-formed.

Without limiting myself to the precise cone struction and arrangement ofparts,I claim 1. In a glass-grinding device, the combination, with "aflat-top rotary grinding-wheel, of a non-rotative ringabove said wheel,an inverted non-rotative cup for holding the article to be ground,fitted and movable,vertically within said non-rotative ring, and suit-This adjustment of the cup is par able means for supporting said ring,for the purpose stated.

2. In a glass-grinding device, the combination, with a flat-top rotarygrinding-wheel, of a non-rotative inverted cup for holding the articleto be ground,having a free vertical movement therewith toward thegrinding-wheel, a holder for said cup, and means for limiting thedescent of the cup and its contained article, for the purpose stated.

3. In a glass-grinding device, the combination, with a flat-topgrinding-wheel, of an inverted cup for holding the article to be groundand suitable means for adjusting it sidewise in relation to thegrinding-wheel and for allowing it free descent thereto within certainlimits, for the purpose stated.

4. In a glass-grinding device, the combination, with a fiattopgrinding-wheel, of an inverted cup for holding the article to beground,-

having wall projecting pins, a ring for holding the cup, having verticalwallgrooves closed at their lower ends to receive the cuppins, and meansfor vertically adjusting the ring in relation to the wheel, for thepurpose stated. 7

5. In a glassgrinding device, the combination, with a fiat-topgrinding-wheel, of an inverted cup for holding the article to be ground,having gripping-rings on its inner wall and pins on its outer wall, anda ring for holding said cup, having vertical wallgrooves for said pins,for the purpose stated.

6. In a glass-grinding device, the frame consisting of the semicircularring parts having flanged ends, diameter -bearings, and baseflanges, incombination with a hollow shaft mounted in said bearings, having aflat-top grindingwheel above said ring, a drivingpulley on said shaft,and suitable means supported on said ring for holding the article to beground upon said wheel.

7. In a glass-grinding device, the combination, with a fiat-topgrinding-wheel, of an inverted cup having yielding grips on its innerwall for holding the article to be ground therein and suitable means forholding the cup for free descent with its contained article.

8. A device for grinding the mouths of glass articles, consisting of aframe, a hollow shaft mounted in bearings therein, having a flat topgrinding-wheel above said frame, fixed and movable standards mountedupon the latter on each side of the wheel, a laterallyadjustable ringupon the adjustable standards, an inverted cup having interior-wallyielding grips, and outer-Wall pins engaging grooves in the said ringand limiting the descent of the cup, for the operation stated.

'9. In a device for grinding the mouths of glass articles, a holder orchuck for the article,

self-adj usting vertically and laterally adj ust- In testimony whereof Ihave signed this specification in the presence of two subscrib- '10 ingwitnesses.

HARRY CURTIS WOOD.

itnesses:

W. J. GRIFFITH, BARNEY E. BUoKLEY.

